Carburetor



ms awz L. E. SCRANNAGE CARBURETOR Original FiledDec. 11, 1920 I s sheets-shim:

7 v 1 jafazzy'zza ya wn-uzs; ATTORNEY jams 3, 1924 I 1,496,102

L; E.'SCRANNAGE CARBURETOR Original Fil ed Dec. 11; 1920 a sheets-sheet 5 AS'YHEZE: ATTORNEY INVEWTOR 7 L. E. SCRANNAGE CARBURETOR Miginal Filed DB I920 5 Sheets-Sheet 4 VIII I INVENTOR [.Z'. jaw/Maya June 3 1924., I 1,496.102

. 1.. E. SCRANNAGE CARBURETOR Original Filed ec. 11, 1920 5 Sheets-Sheet 5 fay/d i w /%74 v INVENTOR BY H WITN SS: ATTORNEY realises asses, tees, j

, Maia Y en,

LAVJRENCE E. SCRANNAGE, OF PHILADELPHIA, PENNSYLVANIA.

CARBURETOR.

- Application filed'December ll, 1920, Serial No. 429,979. Renewed April 14, 1924.

To all whom it may someone:

Be it known that l, LAWRENCE E. Somm niac n, a citizen of the United States, residing at Philadel hia, in the county 'of Philadelphia and tate of Pennsylvania, have in.-

vented new and useful Improvements in Carburetors, of which the following is a specification.

This invention relates to improvements in carburetors for internal combustion engines, the principal object of the invention being to provide means for igniting a mixture of gas and air in acombustion chamber and introducing the products of combustion from this chamber intothe explosive charge as it leaves the carburetor, so that less volatile liquids may be used for running the motor.

Another object of the nvention is to provide an auxiliary air su ply, with means for mixing the quantity o fuel therewith and,

means for drawing on said supply when the motor reaches a high, speed.

Another object of the invention is to provide means for circulating hot water or hot air through the carburetor to heat the mixture passing through the Venturi tube.

This invention also consists in certain other features of construction and inthe.

combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:---

Figure '1 is a plan View of the invention.

Figure 2 is a longitudinal section on line 22 of Figure 1.

Figure 3 1s a section on line 3-3 of Fig- Figure 4 is a section on line 4- -4 of Figure' 1.

Figure 5 is a section on the line 5-5 of Figure 1. I

Figure 6 is a horizontal section on the line 66 of Figure 2. Figure 7 is a detailvertical sectional view showing the modification of the means for supplying fuel mixture to the combustion chamber.

Figure 8 is a sectional detail viewshowing a wire, adapted to be heated by electricity,.used instead of a spark plug.

Figure 9 is a diagrammatic view showing amethod of heating the carburetor by hot air. I v

Figure 10 isa modification for heating the carburetor by hot water.

In these views 1 indicates the body-of the carburetor in which is located the Venturi tube2, the outlet end of which is controlled by the usual butterfly valve 3which is actuated from a point adjacent the drivers seat in any desired manner. The nozzle 4 and needle valve 5 are also arranged in the usual or any desired manner and the air supply to. the Venturi tube is controlled by the spring controlled choke valve 6, this valve being also arranged to be operated by means leading to a point'adjacent thedrivers seat as will be understood. The nozzle 4 is connected by a passage 7 with the float chamber 8, said chamber being connected with the source of supply by connection 9 and tube, not shown. A float 10 is located in the chamber'and this float is adapted to-close the spring-controlled valve 11v through means of the dogs 12 which are carried by the ad justable sleeve 13. From this construction it will beseen that as the float is forced upwardly by the liquid it will cause the dogs to press the stem 14 against the valve 11 so as to seat the same'and thus close the connection between thetfloat chamber and the supply tank. I

The suction created bythe moving pistons will act to draw the fuel from the float. chamber through the nozzle and this liquid will be mixed with the air sucked in past the valve" 6. This action is similar to the action taking place" in carburetors now in use.

I also provide an auxiliary air supply with means for mixing liquid fuel therewith, which is rendered active when the 'en-' gine reaches a high speed, 'Such means comprises a casing 15 whichis connected with the body 1 and the interior of which is in communication with the space within the tube 2 bymeans of the ports 16 and theinterior of this casing is also in communication with the atmosphere by means of the o'ening 17. This opening is normally close by the spring controlled valve 18.

However, when the action reaches a certain speed so that a certain suction is created, this orts 16 into the carburetor. he means ing air consists of a wall 19 of the carburetor which has a U-shaped passage 20 there in, one end of which opens out into the Venturi tube 2 between the ports 16 while the other end is connected with the atmosphere. The bottom of this Ushaped passage is'connected with an extension 7 of passage which leads to the float chamber.

It will thus be seen that the suction created by the engine within the carburetor acts to draw air and fuel through said tube 19 and this mixture will commingle with the air passing through casing 15. The amount of air passing through tube l9 can be controlled by the adjusting screw 21.

A combustion chamber 22 is formed in the upper part of said body 1 and a passage 23 leads from passage 7 to this chamber. A ball valve 24 is arranged in said passage 23 and an air passage 25 has its lower end connected with the passage 23 and its upper end extending through the exterior wall of the' 'casing so .as to permit atmospheric air to enter the passage 23 and mix with the fuel passing upward therethrough. I may also provide a second air passage 26 which is connccted with the upper end of passage 23 at the point where it enters the chamber and this second passage is controlled by the adjustable valve 27 as shown in Figure 7. The mixture in the combustion chamber is ignited by means of the spark plug 28 which is suitably connected with the electric circuit or by a wire coil 29 as shown in Figure 8 which is also adapted to be connected with the electric circuit. If this coil is used it may be placed in a porcelain sleeve 30 as shown in Figure 8. The chamber 22 is connected by port 31 with the outlet of the Venturi tube 2 and this port is controlled by means of valve 32. This valve is actuated from a point adjacent the drivers seat through the lever 33, flexible connection 34 and the hand lever.35 which is located in the casing 36. This hand lever 35 may also control the circuit to the spark plug 28 or to the coil 29 as shown diagrammatically at 37.

The parts would be" so arranged that when .in Eigure 6.

valve 32 is clcsed'by handle 35 therircuit would be broken and when the handle is The combustion chamber 22 can be connected with the space which surrounds the Yenturi tube 2 so as to heat said tube or said combustion chamber can be s rirated from this space by the partition 39, shown Figure 9 shows the tube 2 as being adapted to be heated by hot air, which is supplied in an desired manner to the inlet port 40 and which may be fed into the tube through the opening 411 which is controlled by the spring valve d2.

Fig. 10 shows the tube being adapted to be heated by hot-water, the supply pipe of which is connected withithe inlet port 4O and an outlet pipe 41 carries the water back to the heating means.

While I have shown the main part of the combustion chamber at the upper part of the carburetor it will of course be understood that itmay be located in any other desired place and it will also be understood that other means may be used for igniting the charge within the combustion chamber than those shown.

'W'hat I claim is: A carburetor of the class described comprising a mixing chamber, a combustion chamber associated therewith-a high speed air inlet, a spring valve, controlling the same, a wall of the carburetor having a U- shaped' passage therein which is connected with the fuel conduit of the carburetor, the inlet of said passage'being arranged in the path of the high speed air supply and the outlet therefrom opening into the combustion chamber in alignment with said inlet. In testimony whereof I affix my signature.

LAWRENCE E. SORANNAGE.

-. enturi 

